Which is an example of Biological Evidence?

• A. Blood, Saliva, Hair, and Other Bodily Fluids Used for DNA Analysis.
• B. Soil
• C. Gunpowder Residue
• D. Surveillance Footage

Answer: (A)

Biological evidence consists of material that comes from living organisms and can be tested to extract DNA or other biological information. Blood, saliva, hair, and other bodily fluids are classic examples because they originate from a person or animal and can yield genetic profiles used to identify individuals or link them to a scene. In contrast, soil is environmental material and, while it can carry traces of biology, is not inherently biological evidence focused on DNA analysis. Gunpowder residue is chemical in nature, not biological, and surveillance footage is digital or physical documentation rather than a biological substance. So the first option best exemplifies biological evidence.